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Artyom0805 [142]

3 years ago

9

A saving account pays 3.6% per annum simple interest Heidi puts £400 into the account, how much will she have in the account aft

er 5 years?

1 answer:

zheka24 [161]3 years ago

4 0

One year:
0.036(400)+400
Because it is 5 years:
5(0.036(400))+400
0.18(400)+400
We can make it simpler:
1.18(400)
Multiply
472
SHE WILL HAVE £472

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Answer:

$x=30\\y=68\\z=82$

Step-by-step explanation:

x = measure of the first angle

y = measure of the second angle

z = measure of the third angle

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And remember that the sum of these three angles must be equal to 180.

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Let's take these equations

$y+z=5x\\z=y+14\\x+y+z=180$

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$x+y+z=180\\x+(y+z)=180\\x+(5x)=180$

Distribute the + sign

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Divide by 6.

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Let's take another equation... for example $z=y+14$

I'm going to take this one because if I replace x and z in the third equation, all I'll have left will be y.

$x+y+z=180\\30+y+(y+14)=180$

Distribute the + sign and Combine like terms;

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Now divide by 2.

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